405839741 has 2 divisors, whose sum is σ = 405839742. Its totient is φ = 405839740.

The previous prime is 405839737. The next prime is 405839743. The reversal of 405839741 is 147938504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 290191225 + 115648516 = 17035^2 + 10754^2 .

It is a cyclic number.

It is not a de Polignac number, because 405839741 - 2² = 405839737 is a prime.

Together with 405839743, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405839743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202919870 + 202919871.

It is an arithmetic number, because the mean of its divisors is an integer number (202919871).

Almost surely, 2^405839741 is an apocalyptic number.

It is an amenable number.

405839741 is a deficient number, since it is larger than the sum of its proper divisors (1).

405839741 is an equidigital number, since it uses as much as digits as its factorization.

405839741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 405839741 is about 20145.4645267862. The cubic root of 405839741 is about 740.3746222234.

The spelling of 405839741 in words is "four hundred five million, eight hundred thirty-nine thousand, seven hundred forty-one".